Full Idea
How can you define truth, without already assuming the distinction between a true definition and a false one?
Gist of Idea
Defining truth presupposes that there can be a true definition
Source
Roger Scruton (Beauty: a very short introduction [2011], 1)
Book Reference
Scruton,Roger: 'Beauty: A Very Short Introduction' [OUP 2011], p.4
A Reaction
Don't say we have to accept truth as yet another primitive! Philosophers are out of business if all the basic concepts are primitive. The axiomatic approach to truth is an alternative - by specifying how the primitive should be used.